                    UMContextCollection<@{mbe_fieldset_upper}ExtendContext>  @{mbe_fieldset_low}Contexts = new UMContextCollection<@{mbe_fieldset_upper}ExtendContext>();
                    List<Entity> @{mbe_fieldset_low}Entities = new EntityFinder("@{mbe_fieldset_from}").findByExpr(filterStr); 